This rotary hammer dust shroud for hole cleaning is OSHA Table 1 compliant when paired with the DEWALT® SDS MAX* combination hammers or SDS PLUS rotary hammers, select vacuums and extractors. It has 2 interchangeable drilling heads for professional-level dust removal. One drilling head is for holes up to 1-1/2 in. And the Other drilling head is for holes up to 2 in.